function CalculateRepayment(){
	var loanamount= formCalc.muamount.value;
    var interest= formCalc.muinterest.value;
	var term =getmenuvalue(formCalc.muterm);
	var I= interest/12;
	var X=1/(1+I/100);
	var N= term *12;
formCalc.txtrepay.value = formatnumber(loanamount*(X-1)/(Math.pow(X,N+1)-X));
formCalc.txtinterest.value=formatnumber((loanamount-loanamount*Math.pow(X,N))*(X-1)/(Math.pow(X,N+1)-X));
}	
function getmenuvalue(obj){
 return (obj.options[obj.selectedIndex].value);
}

function formatnumber(n) {
	return Math.round(n*100)/100;
}